1224145 has 16 divisors (see below), whose sum is σ = 1627920. Its totient is φ = 877824.

The previous prime is 1224133. The next prime is 1224149. The reversal of 1224145 is 5414221.

It can be written as a sum of positive squares in 8 ways, for example, as 20736 + 1203409 = 144^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224145 - 2⁹ = 1223633 is a prime.

1224145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1224149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2151 + ... + 2659.

It is an arithmetic number, because the mean of its divisors is an integer number (101745).

2^1224145 is an apocalyptic number.

It is an amenable number.

1224145 is a deficient number, since it is larger than the sum of its proper divisors (403775).

1224145 is a wasteful number, since it uses less digits than its factorization.

1224145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 320, while the sum is 19.

The square root of 1224145 is about 1106.4108640103. The cubic root of 1224145 is about 106.9738486764.

Adding to 1224145 its reverse (5414221), we get a palindrome (6638366).

It can be divided in two parts, 1224 and 145, that added together give a square (1369 = 37²).

The spelling of 1224145 in words is "one million, two hundred twenty-four thousand, one hundred forty-five".